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Power Apparatus and Systems, IEEE Transactions on

Issue 4 • Date April 1984

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  • IEEE Transactions on Power Apparatus and Systems - Table of contents

    Publication Year: 1984 , Page(s): c1 - 896-b
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    Freely Available from IEEE
  • IEEE Power Engineering Society

    Publication Year: 1984 , Page(s): c2
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    Freely Available from IEEE
  • Research into Lightning Protection of Distribution Systems II-Results From Florida work 1978 and 1979

    Publication Year: 1984 , Page(s): 673 - 682
    Cited by:  Papers (13)
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    Experience in the Tampa Bay area during August 1978 thunderstorms resulted in significant improvements in the field work carried out during 1979. This paper describes the changes to equipment and data sources (see [1, 2]), and presents overall results for the 1979 thunderstorm season. Where appropriate, these are linked to 1978 data and to data obtained from equipment which operated on a year-long basis. View full abstract»

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  • An Aggregate Induction Motor Model for Industrial Plants

    Publication Year: 1984 , Page(s): 683 - 690
    Cited by:  Papers (29)
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    A technique is developed for deriving an equivalent load model to represent the dynamic and steady state effects of a system consisting of induction motors and constant impedance loads interconnected by a network. Motor parameters are calculated from standard specifications, and together with network and load data are incorporated into an admittance matrix which is used to define most of the parameters of the load equivalent. The inertia and running slip are chosen to minimize the error between the transient response of the system and its equivalent. Step responses are calculated using a state approach. Adequacy of the equivalent is validated by comparing the response of the original system and the equivalent to simulated bus voltage change, transformer outage, and remote and local balanced faults using a transient stability program. View full abstract»

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  • Development and Installation of 275KV SF6 Gas-Insulated Transmission Line

    Publication Year: 1984 , Page(s): 691 - 698
    Cited by:  Papers (4)
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    In order to install a commercial 275kV gas-insulated transmission line (called GIL by the authors) on a route with many bends and inclines, a temperature rise test and long-term field test were performed to confirm the current capacity and thermo- mechanical and dielectric characteristics. Fault location and leakage gas removal tests were carried out to evaluate maintenance methods. Based on satisfactory results in all these tests, two circuits of 275kV GILs were installed to connect a gas-insulated substation of the Kansai Electric Power Co., Inc. to an overhead line. View full abstract»

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  • Creepage Phenomena of HPOF Cable

    Publication Year: 1984 , Page(s): 699 - 706
    Cited by:  Papers (1)
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    The first failure of HPOF cable in Japan occurred after its 10 year operation. It was quite unexpected, though repair works were studied and most of necessary equipments have been prepared for future requirements. Investigation revealed that the most possible cause is creepage phenomena due to heavy traffic, which might have pushed splices so that the earth shield of stress-relief cone was distorted, resulting in electric breakdown. Experiments were carried out to confirm the presumption which was also analyzed numerically. After repair works including necessary anchoring of splices, the cable is now in service. View full abstract»

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  • Computer Simulation of an Induction Machine with Spatially Dependent Saturation

    Publication Year: 1984 , Page(s): 707 - 714
    Cited by:  Papers (31)
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    This paper presents a new analog computer model for the simulation of an induction machine which takes into account the spatially dependent main flux saturation effect. Using this model of saturation, an unstable operating region for a voltage fed induction motor with high source impedance has been calculated and has been correlated with both test results and the results predicted by the conventional linearized model. This study clearly demonstrates an improvement over the linearized model in predicting machine dynamic behavior. Because the simulation accurately models large signal as well as small signal behavior it should prove equally useful in predicting transient behavior. The manner of dealing with saturation of the magnetizing field presented in this paper can be readily implemented on a digital as well as an analog computer and can also be extended to the study of other electrical machines. View full abstract»

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  • Steady-State Stability Analysis with Frequency Methods: Optimization of Excitation System Parameters

    Publication Year: 1984 , Page(s): 715 - 722
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    In this paper analysis of the steady-state stability of a large power network is conducted using frequency methods. The problem of selecting the appropriate values of excitation system parameters (e. g., regulator and power system stabilizer gains) for a multimachine power system is considered. A procedure for optimizing these adjustable parameters, to give the best degree of stability at the desired frequency range, is presented. View full abstract»

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  • AC Source-Insulator Interaction in HV Pollution Tests

    Publication Year: 1984 , Page(s): 723 - 732
    Cited by:  Papers (9)
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    In this paper a dynamic model of ac source-insulator interaction during the critical arcing period of polluted high-voltage insulators is developed. The simulation accounts for arc dynamics, arc motion over the contaminated insulator surface, dielectric recovery and restrikes as well as the most relevant parameters of the insulator and the source. View full abstract»

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  • Integration of Financial Constraints into Optimal Generation Planning

    Publication Year: 1984 , Page(s): 733 - 743
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    This paper describes the development and application of a methodology for electric utility generation planning which calculates the optimal strategy to satisfy both standard and financial constraints in a single program. The current model has been developed on the basis of OPPLAN, an optimal generation planning methodology based on linear programming techniques. One of the financial constraints imposed on the linear program in the OPPLAN specifies that the interest coverage ratio must be greater than a user-specified minimum coverage ratio. Three nonlinear relationships were encountered during formulating the coverage ratio. The following statements express the nonlinear relationships. 1) When retained earnings are greater than new equity, all retained earnings must be used for construction. 2) The federal income tax (FIT) must be included only if it is positive. 3) The AFUDC portion allowed in the coverage ratio calculations must be equal to the lesser of the total amount of AFUDC and a certain percentage (usually 10%) of operating income. These are linearized by use of 0, 1 variables. To accelerate the computing speed, two provisions are made: 1) a user specifies whether there will be any equity issuance annually, and he then runs OPPLAN, and compares the selection with RPIFSM (a financial simulation programs) results. If the results are different, he corrects the selection according to RPIFSM. 2) FIT is positive by default. These two options provide rapid convergence to a solution. The new methodology is applied to several case studies. View full abstract»

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  • Development and Actual Use of 275KV Low-Loss Self-Contained Oil-Filled Cables with Laminated Paper Insulated

    Publication Year: 1984 , Page(s): 744 - 753
    Cited by:  Papers (4)
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    This paper summarizes the development of two kinds of new 275kV self-contained oil-filled cables which are insulated with Polypropylene Laminated Paper (PPLP) or Fluorinated Ethylene Propylene Copolymer Laminated Paper (FEP/C) and kraft paper, respectively. Prototype cables were manufactured, tested in the factories, and subjected to an accelerated longterm (1-1/2 year) field test. After the successful field test, these two kinds of cables have been utilized in a main commercial transmission line of the Kansai Electric Power Co., Inc. since November 1982. View full abstract»

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  • On the Theory of Cylindrical Rotor A. C. Machines, Including Main Flux Saturation

    Publication Year: 1984 , Page(s): 754 - 761
    Cited by:  Papers (11)
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    In recently published papers concerned with variable saturation in cylindrical rotor a. c. machines, a cross-saturation effect was described, caused by variable saturation. Using the same approximations as applied in the cited papers we will show that Faraday's law applied to cylindrical rotor a.c. machines including variable saturation excludes any transformer effect that links the mutually perpendicular axes of a general reference frame. In reality the induced component voltages in the directions of coordinate axes are well defined by transformer and rotational effects in agreement to Faraday's law, showing that the coordinate axes of the general coordinate system used, are magnetically independent. View full abstract»

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  • Paralleling and Deparalleling Tests on Nelson River HVDC Bipoles 1 and 2

    Publication Year: 1984 , Page(s): 762 - 770
    Cited by:  Papers (3)
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    This paper reports on low-voltage (±150 kV) paralleling and deparalleling tests on the Nelson River HVDC bipoles 1 and 2 performed in the summer of 1982 as preparation to the final high-voltage (±463.5 kV) tests after completion of Bipole 2. The control system developed for paralleling, parallel operation, and deparalleling of Bipoles 1 and 2 has been described in an earlier paper. The present paper provides additional information on these controls with respect to the control system hierarchy, telecommunication requirements and the hardware, especially the new hardware installed in Bipole 1 controls. System aspects of paralleling and special considerations for these low-voltage tests are also discussed. View full abstract»

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  • Tests on a 320 KVA Superconducting Generator

    Publication Year: 1984 , Page(s): 771 - 781
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    In order to verify the design procedures for superconducting machines, a small 2-pole externalpole synchronous generator with a stationary field winding of NbTi has been built and tested. A report on the first 20 test cycles is given, including discussion of difficulties encountered. In addition to steady-state measurements, which agree well with the calculations, the results of the first tests of transient behaviour are given. The program given for future tests indicates concentration more on the transient behaviour of the machine and on studies of the protection system for the superconducting winding. View full abstract»

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  • Very Short Tailed Lightning Double Exponential Wave Generation Techniques Based on Marx Circuit Standard Configurations

    Publication Year: 1984 , Page(s): 782 - 787
    Cited by:  Papers (4)
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    When impulse voltages of very short time to half-value are generated with a standard Marx circuit, there may be a considerable decrease in efficiency. View full abstract»

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  • On Line Stabilization of the large HV-AC-DC Power System BY Using Observation Decoupled Reference as a System-Wide Target

    Publication Year: 1984 , Page(s): 788 - 797
    Cited by:  Papers (4)
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    The concept of the Observation Decoupled Reference vector was introduced earlier [1] by the Washington University research group. It was demonstrated [2] [3] that effective system stabilization can be accomplished based on this new concept using purely local information and local action at the generating stations provided control means such as damping resistors or load skipping are available at each generating station. In this paper the Observation Decoupled Reference vector is considered as a systemwide target to be tracked and approached using a limited number of contr-l devices such as the converter terminals of an overlying HV-DC system. The tradeoff is that fast reliable communication between the generating stations and the Control Center are needed. Computations of moderate size are carried out both at the local units and at the Control Center. Very effective system stabilization is demonstrated by large scale simulation. It is believed that this represents the first real solution for using the (multiterminal) HV-DC system to stabilize an associated AC system. View full abstract»

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  • A Mathematical Model for the Doubly-Fed Wound Rotor Generator

    Publication Year: 1984 , Page(s): 798 - 802
    Cited by:  Papers (3)
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    This paper is a mathematical analysis of a doubly-fed wound rotor machine used as a constant frequency generator. The purpose of this analysis is to derive a consistent set of circuit equations which produce constant stator frequency and constant stator voltage. Starting with instantaneous circuit equations, the necessary rotor voltages and currents are derived. The model, thus obtained, is assumed to be valid, since the resulting relationships between mechanical power and active volt-amperes agrees with the results of others. In addition, the model allows for a new interpretation of the power flow in the doubly-fed generator. View full abstract»

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  • Interrupting Characteristics of Puffer and Suction Type SF6 Gas Interrupter Especially in Thermal Breakdown Region

    Publication Year: 1984 , Page(s): 803 - 810
    Cited by:  Papers (1)
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    Interrupting characteristics in thermal region within the range of 30-60kA current levels have been examined with an experimental model breaker under some SF6 gas pressures of 4.5-15 bars. The interrupter tested with the breaker was designed to shorten the arcing time based on the puffer principle with the aid of a suction chamber. Arcing time was shortened with the fastly established gas-flow into the suction chamber in comparison with conventional puffer type interrupters. Interrupting characteristics in short arcing time region were much influenced by interrupter structures, interrupting currents, filling gas pressures and rates of rise of recovery voltage (rrrV). Particularly, in large current region over 50kA, the minimum arcing time was sensitively affected by moving side interrupter structures. Using a newly developed interrupter characterized by a follower type insulating nozzle, it has demonstrated a minimum arcing time of 0.37 cycles for the 63kA 90% short line fault (SLF) condition for two breaks per pole under an SF6 gas pressure of 10 bars, and also has demonstrated 0.33 cycles for the 50kA 90% SLF condition under a pressure of 6 bars. View full abstract»

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  • Three Phase, Steady-State Static Var generator Filter Design for Power Systems

    Publication Year: 1984 , Page(s): 811 - 818
    Cited by:  Papers (1)
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    In power systems, the harmonics originating from thyristor switching are usually eliminated by filtering. Exact solutions of voltages and currents for Static VAR Generators (SVG) used in power systems are found using a state variable formulation with time-domain convolution. Each conduction period of delta-connected thyristor- controlled-reactors is a linear circuit. The initial conditions for each piece-wise linear circuit depend on the prior firing sequence of the thyristors. An additional condition is zero initial current through the thyristor when turning on. There are six possible thyristor conduction sequences for every half cycle of the periodic system voltage. An iterative method is used to determine the initial conditions for the first of the six conduction sequences in order to force the system response into periodic operation at the line frequency. State variable transition matrices and initial conditions are then used to calculate circuit, voltages and currents at any instant of time. It is thus possible to obtain peaks or determine harmonic distributions. Unbalanced three phase voltages and component unbalances may be introduced in the circuit using this analysis. Filters, which are capacitive compensation at the line frequency, are then sized to limit harmonic content in the voltage supply. View full abstract»

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  • Load Behavior Observed in LILCO and RG&E Systems

    Publication Year: 1984 , Page(s): 819 - 831
    Cited by:  Papers (21)
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    Realistic load models are required to improve the quality of bulk power system studies. For a better understanding of the basic nature of the load behavior under abnormal conditions, an extensive series of tests were conducted during different seasons at three test sites of two utility systems in New York State. View full abstract»

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  • A Comparison of 100% Stator Ground Fault Protection Schemes for Generator Stator Windings

    Publication Year: 1984 , Page(s): 832 - 840
    Cited by:  Papers (31)
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    This paper describes three different schemes for detecting single-phase-to-ground faults in 100% of the generator stator winding. The operating theory, a setting example, and field measurements are provided for each of the three schemes. A chart comparing the significant application characteristics of the three schemes is presented. View full abstract»

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  • High Voltage Impulse Restoration with a Fast Deconvolution Technique

    Publication Year: 1984 , Page(s): 841 - 848
    Cited by:  Papers (2)
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    This paper presents a fast digital method of restoring high voltage impulse which is distorted by the divider system. This difficult problem is solved using a deconvolution algorithm designed for real time applications. Much emphasis is laid on validation of the method, which was performed by comparing measurements of both input and output of the voltage divider in an experimental set-up. A systematic study performed with a wide range of voltage dividers helped to define practical rules for algorithm parameter selection. The restoration method is not computation consuming and, if systematically used, it might make hard-to-optimize divider design unnecessary. View full abstract»

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  • Breakdown of a Coaxial-Cylinder Gap in SF6 Under Switching Impulse Voltages

    Publication Year: 1984 , Page(s): 849 - 854
    Cited by:  Papers (1)
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    The paper constitutes an experimental investigation into the impulse voltage strength of a coaxial-cylinder gap in SF6. Impulse voltage waves of both polarities and different fronts were applied at the gap at different pressures. In each case the fifty percent breakdown voltage was determined and plotted according to the pressure for a given wave front and according to the wave front at a given pressure. An approach of the breakdown mechanisms is then developped for explaining the trend of the obtained curves. View full abstract»

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  • Electrical Features of the Wallace Dam Pumped Hydro Project

    Publication Year: 1984 , Page(s): 855 - 860
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    The Wallace Dam Pumped Hydro Project was placed in full commercial operation in December 1980. This paper describes the significant features of this combination run-of-river and pumped storage project. Full-voltage, across-the-line starting is used for the 83,000 hp motors, making this the largest known unit using this starting method. The control system, using hard-wired, relay logic is also described. View full abstract»

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  • Study of Time Dissemination Methods Used on an Electric Power System with Particular Reference to Hydro-Quebec

    Publication Year: 1984 , Page(s): 861 - 868
    Cited by:  Papers (2)
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    This paper presents an analysis of the most important time dissemination methods in use and describes the difficulties encountered or foreseen in applying such methods in electrical substations. The latter part of the paper is devoted to methods developed and applied by Hydro-Québec, in particular a time dissemination system used in conjunction with telephone circuits. A signal distortion problem is analyzed analytically and a correction technique is described. The experimental performance of the improved system is reported. View full abstract»

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Aims & Scope

This Transactions ceased production in 1985. The current retitled publication is IEEE Transactions on Energy Conversion and IEEE Transactions on Power Delivery, and IEEE Transactions on Power Systems.

Full Aims & Scope